Reinforced-concrete culvert



P. s. EASTERDAY.

REINFORCED CONCRETE CULVERT.

APPLICATION FILED MAY 21. 1917.

Patented Mar. 2, 1920.

UNITED STATES PATENT OFFICE.

PHILIP S. EASTERIDAY, OF PORTLAND, OREGON.

REINFORCED-CONCRETE CULVERT.

Application filed May 21, 1917.

To all LUZLOWL it may concern:

Be it known that I, PHILIP S. EASTERDAY a citizen of the United States, residing in the city of Portland, county of Multnomah, and State of Oregon, have invented certain new and useful Improvements in Reinforced-Concrete Culverts, of which the following is a specification.

My invention relates to reinforced concrete culverts, such as referred to in my United States Patent 1,061,665, issued May 13, 1913, and my allowed application for reinforced concrete construction, filed May 24, 1916, Serial Number 99,643, and allowed October 25, 1916.

The principal object of my present invention is to provide an improved arrangement for the reinforcement embedded in round concrete conduit sections, adapted to be laid lengthwise, and which must, at times, support considerable weight on their top sides.

I am aware that it is old to use woven wire for such reinforcement and to place the same in different forms around the conduit. It is also old to use two rolls, or rings, of woven wire fabric in a single section, one roll being embedded concentrically therein near the outer surface, and the other roll being embedded concentrically therein near the inner surface of the conduit form. This, of course, requires a considerable amount of the woven wire fabric. I pr=- fer to use a high tension steel triangular mesh of wire fabric for reinforcing my conduit sections, embedding one line, or cylindrical form thereof, concentrically within the form near the outer surface thereof, and then placing short additional cross, or connecting sections of the reinforcing mesh,

one across the top and one across the bot-' tom, extending throughout the length of each section with their opposite sides secured to the outer reinforcement so that their middle portions' will occupy a position near the inner side, or surface, of the form.

In order to more clearly explain my invention I have illustrated the same in the accompanying sheet of drawings, which I will now describe.

Figure 1 is a cross sectional view of a conduit section embodying my invention;

'Fig. 2 is a fragmentary side elevation of the joined ends of two sections; and

Fig. 3 is a cross sectional view in which Specification of Letters Patent.

Patented Mar. 2, 1920.

Serial No. 170,013.

cross short connecting sections of reinforcement are also shown at the sides as well as at the top and bottom of the form.

Referring now more in detail to the drawings, 1 and 2 designate two sections of reinforced concrete conduit, each being reinforced by means of high tension steel triangular mesh fabric 3, a section of the material being broken out in Fig. 2 to show the reinforcement.

In my improved construction, as here .illustrated, this reinforced wire fabric is placed concentrically within the form adjacent the outer surface thereof, as illustrated in Fig. 1. 4 designates two short cross connecting sections embedded in the form and connected at their opposite sides with the outer ring, or line of enforcement, as at 5. Thus any weight on top of said conduit which might otherwise cause the same to collapse inwardly, is resisted by said cross connecting sections, which prevent the body of the conduit from cracking on its inner face under the stress placed thereupon.

In Fig. 3, the outer line or circle of reinforcement is designated 3 and the corresponding top and bottom connecting section are designated a. In this embodiment I have shown at the opposite sides of the form, two similar connecting sections of reinforcement, designated 6 which, will operate to resist any inward pressure on the opposite outer sides of said conduit.

Thus by using the continuous bands, or strands, of the wire fabric arranged around the form near its outer surface and concentric therewith, in the usual manner, the form is in a general way reinforced and strengthened, and by providing my short connecting sections 4, I not only make a saving in material, as compared with two full lines, or rings, of reinforcement, but I get an improved construction giving increased resisting strength across the top and across the bottom.

I am aware that slight changes can be made in my improved arrangement as here illustrated, without departing from the spirit thereof, and I do not, therefore, limit the same to this exact showing, except as I may be limited by the hereto appended claims.

I claim:

1. A reinforcement for round concrete conduit sections comprising a cylindrical form of Wire fabric embedded. concentrically in the form, and short connectin chord sections of said Wire fabric embedde therein and connected at their opposite sides with said concentrically arranged reinforcement, substantially as described.

2. A reinforcement for round concrete conduit sections comprising a cylindrical form of Wire fabric embedded concentrically in the form near its outer surface, and short connecting chord sections of said Wire fabric embedded therein and connected at their opposite sides with said concentrically arranged reinforcement with their middle portions near the inner surface thereof, sub stantially as described.

3. An improved reinforced concrete conduit section having a cylindrical form of high tension steel triangular mesh fabric embedded concentrically therein near its outer surface, and short cross connecting chord sections extending lengthwise through said conduit at its top and bottom sides, and each section being connected at two points to said concentrically arranged reinforcement, their middle portions lying close to the inner top and bottom surfaces, substantially as described.

Signed at Portland Multnomah county, Oregon, this 15th day of May, 1917.

PHILIP S. EASTERDAY.

In presence of- I. M. GRIFFIN, J. C. STRENG. 

